Most people know that just about every Android phone has a restricted hardware design, not an expandable one.

So, "turn your phone into X" is bound to automatically evoke images of another device that plugs into the phone via common connectors like USB or the audio jack and an app on the phone to control that device. That's what the phrase means to most people in the context of Android.

"Turn your phone into a ham radio transceiver controller" is neither needed nor entirely accurate, because then people will assume it can control _any_ ham radio transceiver.

We need a compact short wave transceiver device actually.

The only thing that really helps extend the range is elevating the antenna, and repeaters allow you to do that even between two mobile stations.

So maybe the 1w is also a regulatory issue.